水科学进展2016，Vol.27Issue(4)：492-500,9.DOI:10.14042/j.cnki.32.1309.2016.04.002
变化环境下渭河流域水文干旱演变特征剖析
Hydrological drought characteristics in the Weihe catchment in a changing environment
摘要
Abstract
Environmental change not only quantitatively affects water resources, but also causes non⁃stationarity in hydrological processes, which challenges the applicability of traditional drought assessment methodologies. Based on data for 1961 to 2013 from two hydrological stations, 62 rain gauge stations, and 24 meteorological stations within the Weihe catchment, this study evaluated the effect of climate change and human activities on runoff reduction using a macro⁃scale distributed hydrological model along with the Variable Infiltration Capacity ( VIC) model. The spatiotem⁃poral characteristics of hydrological drought were analyzed by the Standardized Runoff Index ( SRI) which was calcu⁃lated by multi⁃parameterization schemes. The robustness of SRI under non⁃stationarity as well as the impact of environ⁃mental change on the hydrological evolution were analyzed. Results showed that the observed significant runoff reduc⁃tion at the Xianyang and Huaxian hydrological stations in the period of 1991—2013 was mainly due to human activi⁃ties, which accounted for -66. 7% and -71. 0% of the total change, respectively. The SRIv series that were based on the time⁃variant parameterization scheme, could rationally reproduce the historical hydrological droughts. It was also found that after 1991 human activities mainly resulted in the short⁃term drought fluctuation and climate change mainly led to the trends of droughts and floods in the Weihe catchment.关键词
气候变化/人类活动/径流/水文干旱/时空特征/渭河流域Key words
climate change/human activity/runoff/hydrological drought/spatiotemporal characteristics/Weihe catchment分类
建筑与水利引用本文复制引用
任立良,沈鸿仁,袁飞,赵崇旭,杨肖丽,郑培丽..变化环境下渭河流域水文干旱演变特征剖析[J].水科学进展,2016,27(4):492-500,9.基金项目
“十三五”国家重点研发计划资助项目（2016YFA0601504）；国家自然科学基金资助项目（41323001） The study is financially supported by the National Key Research and Development Plan of China （ No．2016YFA0601504） and the National Natural Science Foundation of China （ No．41323001）． （）
